Hi folks. Hoping you can help...
In January we had an open-plan conservatory added with two large-ish radiators plumbed into the heating system. The (professional) plumber adjusted our 7 year-old heating system to accommodate these new radiators and the extra space of the conservatory. I don't know exactly what he did, except turn the pump speed from II to III. The heating system works well - radiators and boiler have coped with the change to the house's layout.
Since then, two of the original Danfoss TRVs have hummed once the system is up to temperature. The humming starts quiet and becomes intrusive (presumably as the valve closes). I've tried turning down the pump to II again (at the plumber's advice) but the humming is still there (although the system is quieter generally at speed II). The only way to stop the hum is to turn the two TRVs down/off completely.
Before I get my hands dirty and try to replace these two valves, does anybody have a suggestion for me to try and tune the system? Perhaps the plumber adjusted the bypass valve to force more water through the radiators? Should I tweak this?
Thanks in advance.
Ben
In January we had an open-plan conservatory added with two large-ish radiators plumbed into the heating system. The (professional) plumber adjusted our 7 year-old heating system to accommodate these new radiators and the extra space of the conservatory. I don't know exactly what he did, except turn the pump speed from II to III. The heating system works well - radiators and boiler have coped with the change to the house's layout.
Since then, two of the original Danfoss TRVs have hummed once the system is up to temperature. The humming starts quiet and becomes intrusive (presumably as the valve closes). I've tried turning down the pump to II again (at the plumber's advice) but the humming is still there (although the system is quieter generally at speed II). The only way to stop the hum is to turn the two TRVs down/off completely.
Before I get my hands dirty and try to replace these two valves, does anybody have a suggestion for me to try and tune the system? Perhaps the plumber adjusted the bypass valve to force more water through the radiators? Should I tweak this?
Thanks in advance.
Ben
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